Automated Core Axes and Structures
In addition to the manual structure logging offered in Insight (see Logging Structures), the GeoCore X10 analysis also attempts to automatically identify several structural aspects of the scanned core. This section describes the data sets that are currently offered, and how to use them.
Caution
The data sets presented in this section constitute automated predictions based on custom-tailored algorithms, with performance that may vary depending on factors such as the quality of the scanned core and heterogeneities in the scanned material. While the predictions may often constitute a good starting point, or even an accurate result, it is ultimately up to the expert user to vet (or correct) them.
Core Axes
While the core axis and the scanning tube axis should to good approximation align for full-core material of high quality, it is not necessarily the case for e.g. half-core or rubbly material. The GeoCore X10 therefore identifies the core axes of rock pieces which can be fitted as cylinders or half cylinders.
Identified core axes can be shown in the Preview area, by selecting Show → Core Axes from the menu bar.
The axes of identified core pieces are shown as green full lines, whereas depth ranges that lack identifed core pieces are shown by red dashed lines through the cylindrical axis of the scanned sample:
Joints
In connection to the rock pieces and core axes, several types of structures related to geological joints are predicted.
To import automated structure predictions, click Import... in the Structures Toolbox to bring up up a dialog with import options:
Top faces and Bottom faces denotes planar fits to the top and bottom faces of the core pieces with identified core axes.
Hidden joints, as the name suggests, denotes possible joints that were not identified in the core axes prediction, i.e. joints that divide a single identified core axis into several axes. This may for instance result from accurate puzzling together of well-fitting pieces in the scanning tube, which makes it difficult to separate the pieces from each other in the tomopgraphic 3D image.
The image illustrates one example for each type of auto predicted structure:
Once imported, a comment is appended to each structure, to set it apart from the manually logged structures:
